src/mathed/math_parser.C

   1 /*
   2  *  File:        math_parser.C
   3  *  Purpose:     Parser for mathed
   4  *  Author:      Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
   5  *  Created:     January 1996
   6  *  Description: Parse LaTeX2e math mode code.
   7  *
   8  *  Dependencies: Xlib, XForms
   9  *
  10  *  Copyright: 1996, Alejandro Aguilar Sierra
  11  *
  12  *   Version: 0.8beta.
  13  *
  14  *   You are free to use and modify this code under the terms of
  15  *   the GNU General Public Licence version 2 or later.
  16  */
  17
  18 // {[(
  19
  20 #include <config.h>
  21
  22 #include <cctype>
  23
  24 #ifdef __GNUG__
  25 #pragma implementation
  26 #endif
  27
  28 #include "math_parser.h"
  29 #include "array.h"
  30 #include "math_inset.h"
  31 #include "math_arrayinset.h"
  32 #include "math_bigopinset.h"
  33 #include "math_charinset.h"
  34 #include "math_dotsinset.h"
  35 #include "math_decorationinset.h"
  36 #include "math_deliminset.h"
  37 #include "math_fracinset.h"
  38 #include "math_funcinset.h"
  39 #include "math_funcliminset.h"
  40 #include "math_macro.h"
  41 #include "math_macrotable.h"
  42 #include "math_macrotemplate.h"
  43 #include "math_matrixinset.h"
  44 #include "math_rootinset.h"
  45 #include "math_scriptinset.h"
  46 #include "math_sizeinset.h"
  47 #include "math_spaceinset.h"
  48 #include "math_sqrtinset.h"
  49 #include "math_stackrelinset.h"
  50 #include "math_symbolinset.h"
  51 #include "debug.h"
  52 #include "mathed/support.h"
  53 #include "lyxlex.h"
  54 #include "support/lstrings.h"
  55
  56 using std::istream;
  57 using std::endl;
  58
  59
  60
  61 // These are lexical codes, not semantic
  62 enum lexcode_enum {
  63         LexNone,
  64         LexESC,
  65         LexAlpha,
  66         LexDigit,
  67         LexBOP,         // Binary operators or relations
  68         LexMathSpace,
  69         LexOpen,
  70         LexClose,
  71         LexComment,
  72         LexArgument,
  73         LexSpace,
  74         LexNewLine,
  75         LexOther,
  76         LexMath,
  77         LexSelf
  78 };
  79
  80 lexcode_enum lexcode[256];
  81
  82
  83 namespace {
  84
  85 void mathed_parse_into(MathArray & array, unsigned flags);
  86
  87 unsigned char getuchar(std::istream * is)
  88 {
  89         char c = 0;
  90         is->get(c);
  91         if (!is->good())
  92                 lyxerr << "The input stream is not well..." << endl;
  93
  94         return static_cast<unsigned char>(c);
  95 }
  96
  97 const unsigned char LM_TK_OPEN  = '{';
  98 const unsigned char LM_TK_CLOSE = '}';
  99
 100 enum {
 101         FLAG_BRACE      = 1 << 0,  //  A { needed              //}
 102         FLAG_BRACE_LAST = 1 << 1,  //  // { Last } ends the parsing process
 103         FLAG_RIGHT      = 1 << 2,  //  Next right ends the parsing process
 104         FLAG_END        = 1 << 3,  //  Next end ends the parsing process
 105         FLAG_BRACE_FONT = 1 << 4,  //  // { Next } closes a font
 106         FLAG_BRACK_END  = 1 << 5,  //  // [ Next ] ends the parsing process
 107         FLAG_AMPERSAND  = 1 << 6,  //  Next & ends the parsing process
 108         FLAG_NEWLINE    = 1 << 7,  //  Next \\ ends the parsing process
 109         FLAG_ITEM       = 1 << 8,  //  read a (possibly braced token)
 110         FLAG_LEAVE      = 1 << 9,  //  marker for leaving the
 111         FLAG_OPTARG     = 1 << 10  //  reads an argument in []
 112 };
 113
 114 ///
 115 union {
 116         ///
 117         int i;
 118         ///
 119         latexkeys const * l;
 120 } yylval;
 121
 122
 123
 124 string yytext;
 125 int yylineno;
 126 istream * yyis;
 127
 128
 129
 130 struct latex_mathenv_type {
 131         char const *      name;
 132         char const *      basename;
 133         MathInsetTypes    typ;
 134         bool              numbered;
 135         bool              ams;
 136 };
 137
 138 latex_mathenv_type latex_mathenv[] = {
 139         {"math",         "math",         LM_OT_SIMPLE,   0, 0},
 140         {"equation*",    "equation",     LM_OT_EQUATION, 0, 0},
 141         {"equation",     "equation",     LM_OT_EQUATION, 1, 0},
 142         {"eqnarray*",    "eqnarray",     LM_OT_EQNARRAY, 0, 0},
 143         {"eqnarray",     "eqnarray",     LM_OT_EQNARRAY, 1, 0},
 144         {"align*",       "align",        LM_OT_ALIGN,    0, 1},
 145         {"align",        "align",        LM_OT_ALIGN,    1, 1},
 146         {"alignat*",     "alignat",      LM_OT_ALIGNAT,  0, 1},
 147         {"alignat",      "alignat",      LM_OT_ALIGNAT,  1, 1},
 148         {"multline*",    "multline",     LM_OT_MULTLINE, 0, 1},
 149         {"multline",     "multline",     LM_OT_MULTLINE, 1, 1},
 150         {"array",        "array",        LM_OT_MATRIX,   0, 1}
 151 };
 152
 153 int const latex_mathenv_num = sizeof(latex_mathenv)/sizeof(latex_mathenv[0]);
 154
 155
 156
 157 void mathPrintError(string const & msg)
 158 {
 159         //lyxerr[Debug::MATHED] << "Line ~" << yylineno << ": Math parse error: " << msg << endl;
 160         lyxerr << "Line ~" << yylineno << ": Math parse error: " << msg << endl;
 161 }
 162
 163
 164 void lexInit()
 165 {
 166         for (int i = 0; i <= 255; ++i) {
 167                 if (isdigit(i))
 168                         lexcode[i] = LexDigit;
 169                 else if (isspace(i))
 170                         lexcode[i] = LexSpace;
 171                 else
 172                         lexcode[i] = LexAlpha;
 173         }
 174
 175         lexcode['\t'] = lexcode['\f'] = lexcode[' '] = LexSpace;
 176         lexcode['\n'] = LexNewLine;
 177         lexcode['%'] = LexComment;
 178         lexcode['#'] = LexArgument;
 179         lexcode['$'] = LexMath;
 180         lexcode['+'] = lexcode['-'] = lexcode['*'] = lexcode['/']
 181                 = lexcode['<'] = lexcode['>'] = lexcode['='] = LexBOP;
 182
 183         lexcode['!'] = lexcode[','] = lexcode[':']
 184                 = lexcode[';'] = LexMathSpace;
 185
 186         lexcode['('] = lexcode[')'] = lexcode['|'] = lexcode['.'] =
 187                 lexcode['?'] = LexOther;
 188
 189         lexcode['\''] = lexcode['@'] = LexAlpha;
 190
 191         lexcode['['] = lexcode[']'] = lexcode['^'] = lexcode['_'] =
 192                 lexcode['&'] = LexSelf;
 193
 194         lexcode['\\'] = LexESC;
 195         lexcode['{'] = LexOpen;
 196         lexcode['}'] = LexClose;
 197 }
 198
 199
 200 string lexArg(unsigned char lf, bool accept_spaces = false)
 201 {
 202         string result;
 203         unsigned char c = 0;
 204         while (yyis->good()) {
 205                 c = getuchar(yyis);
 206                 if (!isspace(c))
 207                         break;
 208         }
 209
 210         if (c != lf) {
 211                 yyis->putback(c);
 212                 return result;
 213         }
 214
 215         unsigned char rg = 0;
 216         if (lf == '{') rg = '}';
 217         if (lf == '[') rg = ']';
 218         if (lf == '(') rg = ')';
 219         if (!rg) {
 220                 lyxerr[Debug::MATHED] << "Math parse error: unknown bracket '"
 221                         << lf << "'" << endl;
 222                 return result;
 223         }
 224
 225         int depth = 1;
 226         do {
 227                 unsigned char c = getuchar(yyis);
 228                 if (c == lf)
 229                         ++depth;
 230                 if (c == rg)
 231                         --depth;
 232                 if ((!isspace(c) || (c == ' ' && accept_spaces)) && depth > 0)
 233                         result += c;
 234         } while (depth > 0 && yyis->good());
 235
 236         return result;
 237 }
 238
 239
 240 int yylex()
 241 {
 242         static bool init_done = false;
 243
 244         if (!init_done) {
 245                 lexInit();
 246                 init_done = true;
 247         }
 248
 249         while (yyis->good()) {
 250                 unsigned char c = getuchar(yyis);
 251                 //lyxerr << "reading byte: '" << c << "' code: " << lexcode[c] << endl;
 252
 253                 if (lexcode[c] == LexNewLine) {
 254                         ++yylineno;
 255                         continue;
 256                 } else if (lexcode[c] == LexComment) {
 257                         do {
 258                                 c = getuchar(yyis);
 259                         } while (c != '\n' && yyis->good());  // eat comments
 260                 } else if (lexcode[c] == LexDigit
 261                            || lexcode[c] == LexOther
 262                            || lexcode[c] == LexMathSpace) {
 263                         yylval.i = c;
 264                         return LM_TK_STR;
 265                 } else if (lexcode[c] == LexAlpha || lexcode[c] == LexSpace) {
 266                         yylval.i = c;
 267                         return LM_TK_ALPHA;
 268                 } else if (lexcode[c] == LexBOP) {
 269                         yylval.i = c;
 270                         return LM_TK_BOP;
 271                 } else if (lexcode[c] == LexMath) {
 272                         yylval.i = 0;
 273                         return LM_TK_MATH;
 274                 } else if (lexcode[c] == LexSelf) {
 275                         return c;
 276                 } else if (lexcode[c] == LexArgument) {
 277                         c = getuchar(yyis);
 278                         yylval.i = c - '0';
 279                         return LM_TK_ARGUMENT;
 280                 } else if (lexcode[c] == LexOpen) {
 281                         return LM_TK_OPEN;
 282                 } else if (lexcode[c] == LexClose) {
 283                         return LM_TK_CLOSE;
 284                 } else if (lexcode[c] == LexESC)   {
 285                         c = getuchar(yyis);
 286                         string s;
 287                         s += c;
 288                         latexkeys const * l = in_word_set(s);
 289                         if (l) {
 290                                 //lyxerr << "found special token for '" << l->name
 291                                 //      << "' : " << l->id << " \n";
 292                                 yylval.i = l->id;
 293                                 return l->token;
 294                         }
 295                         if (lexcode[c] == LexAlpha) {
 296                                 yytext.erase();
 297                                 while (lexcode[c] == LexAlpha && yyis->good()) {
 298                                         yytext += c;
 299                                         c = getuchar(yyis);
 300                                 }
 301                                 while (lexcode[c] == LexSpace && yyis->good())
 302                                         c = getuchar(yyis);
 303                                 if (lexcode[c] != LexSpace)
 304                                         yyis->putback(c);
 305
 306                                 //lyxerr[Debug::MATHED] << "reading: text '" << yytext << "'\n";
 307                                 latexkeys const * l = in_word_set(yytext);
 308                                 if (!l)
 309                                         return LM_TK_UNDEF;
 310
 311                                 if (l->token == LM_TK_BEGIN || l->token == LM_TK_END) {
 312                                         string name = lexArg('{');
 313                                         int i = 0;
 314                                         while (i < latex_mathenv_num && name != latex_mathenv[i].name)
 315                                                  ++i;
 316                                         yylval.i = i;
 317                                 } else if (l->token == LM_TK_SPACE)
 318                                         yylval.i = l->id;
 319                                 else
 320                                         yylval.l = l;
 321                                 return l->token;
 322                         }
 323                 }
 324         }
 325         return 0;
 326 }
 327
 328
 329 MathScriptInset * prevScriptInset(MathArray const & array)
 330 {
 331         MathInset * p = array.back();
 332         return (p && p->isScriptInset()) ? static_cast<MathScriptInset *>(p) : 0;
 333 }
 334
 335
 336 MathInset * lastScriptInset(MathArray & array, bool up, bool down, int limits)
 337 {
 338         MathScriptInset * p = prevScriptInset(array);
 339         if (!p) {
 340                 MathInset * b = array.back();
 341                 if (b && b->isScriptable()) {
 342                         p = new MathScriptInset(up, down, b->clone());
 343                         array.pop_back();
 344                 } else {
 345                         p = new MathScriptInset(up, down);
 346                 }
 347                 array.push_back(p);
 348         }
 349         if (up)
 350                 p->up(true);
 351         if (down)
 352                 p->down(down);
 353         if (limits)
 354                 p->limits(limits);
 355         return p;
 356 }
 357
 358
 359 static bool   curr_num;
 360 static string curr_label;
 361
 362 void mathed_parse_lines(MathGridInset * p, int col, bool numbered, bool outmost)
 363 {
 364         // save global variables
 365         bool   const saved_num   = curr_num;
 366         string const saved_label = curr_label;
 367
 368         for (int row = 0; true; ++row) {
 369                 // reset global variables
 370                 curr_num   = numbered;
 371                 curr_label.erase();
 372
 373                 // reading a row
 374                 int idx = p->nargs() - p->ncols();
 375                 for (int i = 0; i < col - 1; ++i, ++idx)
 376                         mathed_parse_into(p->cell(idx), FLAG_AMPERSAND);
 377                 mathed_parse_into(p->cell(idx), FLAG_NEWLINE | FLAG_END);
 378
 379                 if (outmost) {
 380                         MathMatrixInset * m = static_cast<MathMatrixInset *>(p);
 381                         m->numbered(row, curr_num);
 382                         m->label(row, curr_label);
 383                 }
 384
 385 #ifdef WITH_WARNINGS
 386 #warning Hack!
 387 #endif
 388                 // no newline
 389                 if (yylval.i != -1)
 390                         break;
 391
 392                 p->appendRow();
 393         }
 394
 395         // restore global variables
 396         curr_num   = saved_num;
 397         curr_label = saved_label;
 398 }
 399
 400
 401 MathMacroTemplate * mathed_parse_macro()
 402 {
 403         if (yylex() != LM_TK_NEWCOMMAND) {
 404                 lyxerr << "\\newcommand expected\n";
 405                 return 0;
 406         }
 407
 408         string name = lexArg('{').substr(1);
 409         string arg  = lexArg('[');
 410         int    narg = arg.empty() ? 0 : atoi(arg.c_str());
 411         MathMacroTemplate * p = new MathMacroTemplate(name, narg);
 412         mathed_parse_into(p->cell(0), FLAG_BRACE | FLAG_BRACE_LAST);
 413         return p;
 414 }
 415
 416
 417 MathMatrixInset * mathed_parse_normal()
 418 {
 419         MathMatrixInset * p = 0;
 420         int t = yylex();
 421
 422         switch (t) {
 423                 case LM_TK_MATH:
 424                 case LM_TK_BEGIN: {
 425                         int i = yylval.i;
 426                         lyxerr[Debug::MATHED]
 427                                 << "reading math environment " << i << " "
 428                                 << latex_mathenv[i].name << "\n";
 429
 430                         MathInsetTypes typ = latex_mathenv[i].typ;
 431                         p = new MathMatrixInset(typ);
 432
 433                         switch (typ) {
 434
 435                                 case LM_OT_SIMPLE: {
 436                                         curr_num   = latex_mathenv[i].numbered;
 437                                         curr_label.erase();
 438                                         mathed_parse_into(p->cell(0), 0);
 439                                         p->numbered(0, curr_num);
 440                                         p->label(0, curr_label);
 441                                         break;
 442                                 }
 443
 444                                 case LM_OT_EQUATION: {
 445                                         curr_num   = latex_mathenv[i].numbered;
 446                                         curr_label.erase();
 447                                         mathed_parse_into(p->cell(0), FLAG_END);
 448                                         p->numbered(0, curr_num);
 449                                         p->label(0, curr_label);
 450                                         break;
 451                                 }
 452
 453                                 case LM_OT_EQNARRAY: {
 454                                         mathed_parse_lines(p, 3, latex_mathenv[i].numbered, true);
 455                                         break;
 456                                 }
 457
 458                                 case LM_OT_ALIGN: {
 459                                         p->halign(lexArg('{'));
 460                                         mathed_parse_lines(p, 2, latex_mathenv[i].numbered, true);
 461                                         break;
 462                                 }
 463
 464                                 case LM_OT_ALIGNAT: {
 465                                         p->halign(lexArg('{'));
 466                                         mathed_parse_lines(p, 2, latex_mathenv[i].numbered, true);
 467                                         break;
 468                                 }
 469
 470                                 default:
 471                                         lyxerr[Debug::MATHED]
 472                                                 << "1: unknown math environment: " << typ << "\n";
 473                         }
 474
 475                         break;
 476                 }
 477
 478                 default:
 479                         lyxerr[Debug::MATHED]
 480                                 << "2 unknown math environment: " << t << "\n";
 481         }
 482
 483         return p;
 484 }
 485
 486
 487 void mathed_parse_into(MathArray & array, unsigned flags)
 488 {
 489         static int plevel = -1;
 490
 491         ++plevel;
 492         MathTextCodes yyvarcode   = LM_TC_VAR;
 493
 494         int  t      = yylex();
 495         bool panic  = false;
 496         int  brace  = 0;
 497         int  limits = 0;
 498
 499         while (t) {
 500                 //lyxerr << "t: " << t << " flags: " << flags << " i: " << yylval.i
 501                 //      << " '" << yytext << "'\n";
 502                 //array.dump(lyxerr);
 503                 //lyxerr << "\n";
 504
 505                 if (flags & FLAG_ITEM) {
 506                         flags &= ~FLAG_ITEM;
 507                         if (t == LM_TK_OPEN) {
 508                                 // skip the brace and regard everything to the next matching
 509                                 // closing brace
 510                                 t = yylex();
 511                                 ++brace;
 512                                 flags |= FLAG_BRACE_LAST;
 513                         } else {
 514                                 // regard only this single token
 515                                 flags |= FLAG_LEAVE;
 516                         }
 517                 }
 518
 519                 if ((flags & FLAG_BRACE) && t != LM_TK_OPEN) {
 520                         mathPrintError(
 521                                 "Expected {. Maybe you forgot to enclose an argument in {}");
 522                         panic = true;
 523                         break;
 524                 }
 525
 526                 switch (t) {
 527
 528                 case LM_TK_ALPHA:
 529                         if (!isspace(yylval.i) || yyvarcode == LM_TC_TEXTRM)
 530                                 array.push_back(new MathCharInset(yylval.i, yyvarcode));
 531                         break;
 532
 533                 case LM_TK_ARGUMENT: {
 534                         MathMacroArgument * p = new MathMacroArgument(yylval.i);
 535                         p->code(yyvarcode);
 536                         array.push_back(p);
 537                         break;
 538                 }
 539
 540                 case LM_TK_SPECIAL:
 541                         array.push_back(new MathCharInset(yylval.i, LM_TC_SPECIAL));
 542                         break;
 543
 544                 case LM_TK_STR:
 545                         array.push_back(new MathCharInset(yylval.i, LM_TC_CONST));
 546                         break;
 547
 548                 case LM_TK_OPEN:
 549                         ++brace;
 550                         if (flags & FLAG_BRACE)
 551                                 flags &= ~FLAG_BRACE;
 552                         else
 553                                 array.push_back(new MathCharInset('{', LM_TC_TEX));
 554                         break;
 555
 556                 case LM_TK_CLOSE:
 557                         --brace;
 558                         if (brace < 0) {
 559                                 mathPrintError("Unmatching braces");
 560                                 panic = true;
 561                                 break;
 562                         }
 563                         if (flags & FLAG_BRACE_FONT) {
 564                                 yyvarcode = LM_TC_VAR;
 565                                 flags &= ~FLAG_BRACE_FONT;
 566                                 break;
 567                         }
 568                         if (brace == 0 && (flags & FLAG_BRACE_LAST))
 569                                 flags |= FLAG_LEAVE;
 570                         else
 571                                 array.push_back(new MathCharInset('}', LM_TC_TEX));
 572                         break;
 573
 574                 case '[':
 575                         array.push_back(new MathCharInset('[', LM_TC_CONST));
 576                         break;
 577
 578                 case ']':
 579                         if (flags & FLAG_BRACK_END)
 580                                 flags |= FLAG_LEAVE;
 581                         else
 582                                 array.push_back(new MathCharInset(']', LM_TC_CONST));
 583                         break;
 584
 585                 case '^':
 586                         mathed_parse_into(
 587                                 lastScriptInset(array, true, false, limits)->cell(0), FLAG_ITEM);
 588                         break;
 589
 590                 case '_':
 591                         mathed_parse_into(
 592                                 lastScriptInset(array, false, true, limits)->cell(1), FLAG_ITEM);
 593                         break;
 594
 595                 case LM_TK_LIMIT:
 596                         limits = yylval.l->id;
 597                         //lyxerr << "setting limit to " << limits << "\n";
 598                         break;
 599
 600                 case '&':
 601                         if (flags & FLAG_AMPERSAND) {
 602                                 flags &= ~FLAG_AMPERSAND;
 603                                 --plevel;
 604                                 return;
 605                         }
 606                         lyxerr[Debug::MATHED]
 607                                 << "found tab unexpectedly, array: '" << array << "'\n";
 608                         break;
 609
 610                 case LM_TK_NEWLINE:
 611                         if (flags & FLAG_NEWLINE) {
 612                                 flags &= ~FLAG_NEWLINE;
 613                                 --plevel;
 614                                 return;
 615                         }
 616                         lyxerr[Debug::MATHED]
 617                                 << "found newline unexpectedly, array: '" << array << "'\n";
 618                         break;
 619
 620                 case LM_TK_PROTECT:
 621                         break;
 622
 623                 case LM_TK_BIGSYM:
 624                         limits = 0;
 625                         array.push_back(new MathBigopInset(yylval.l));
 626                         break;
 627
 628                 case LM_TK_FUNCLIM:
 629                         limits = 0;
 630                         array.push_back(new MathFuncLimInset(yylval.l));
 631                         break;
 632
 633                 case LM_TK_SYM:
 634                         limits = 0;
 635                         array.push_back(new MathSymbolInset(yylval.l));
 636                         break;
 637
 638                 case LM_TK_BOP:
 639                         array.push_back(new MathCharInset(yylval.i, LM_TC_BOP));
 640                         break;
 641
 642                 case LM_TK_SPACE:
 643                         if (yylval.i >= 0)
 644                                 array.push_back(new MathSpaceInset(yylval.i));
 645                         break;
 646
 647                 case LM_TK_DOTS:
 648                         array.push_back(new MathDotsInset(yylval.l));
 649                         break;
 650
 651                 case LM_TK_STACK:
 652                 {
 653                         MathStackrelInset * p = new MathStackrelInset;
 654                         mathed_parse_into(p->cell(0), FLAG_ITEM);
 655                         mathed_parse_into(p->cell(1), FLAG_ITEM);
 656                         array.push_back(p);
 657                         break;
 658                 }
 659
 660                 case LM_TK_FRAC:
 661                 {
 662                         MathFracInset * p = new MathFracInset;
 663                         mathed_parse_into(p->cell(0), FLAG_ITEM);
 664                         mathed_parse_into(p->cell(1), FLAG_ITEM);
 665                         array.push_back(p);
 666                         break;
 667                 }
 668
 669                 case LM_TK_SQRT:
 670                 {
 671                         unsigned char c = getuchar(yyis);
 672                         if (c == '[') {
 673                                 array.push_back(new MathRootInset);
 674                                 mathed_parse_into(array.back()->cell(0), FLAG_BRACK_END);
 675                                 mathed_parse_into(array.back()->cell(1), FLAG_ITEM);
 676                         } else {
 677                                 yyis->putback(c);
 678                                 array.push_back(new MathSqrtInset);
 679                                 mathed_parse_into(array.back()->cell(0), FLAG_ITEM);
 680                         }
 681                         break;
 682                 }
 683
 684                 case LM_TK_LEFT:
 685                 {
 686                         int ld = yylex();
 687                         if (ld == LM_TK_SYM)
 688                                 ld = yylval.l->id;
 689                         else if (ld == LM_TK_STR || ld == LM_TK_BOP || ld == LM_TK_SPECIAL)
 690                                 ld = yylval.i;
 691
 692                         MathArray ar;
 693                         mathed_parse_into(ar, FLAG_RIGHT);
 694
 695                         int rd = yylex();
 696                         if (rd == LM_TK_SYM)
 697                                 rd = yylval.l->id;
 698                         else if (rd == LM_TK_STR || rd == LM_TK_BOP || rd == LM_TK_SPECIAL)
 699                                 rd = yylval.i;
 700
 701                         MathDelimInset * dl = new MathDelimInset(ld, rd);
 702                         dl->cell(0) = ar;
 703                         array.push_back(dl);
 704                         break;
 705                 }
 706
 707                 case LM_TK_RIGHT:
 708                         if (flags & FLAG_RIGHT) {
 709                                 --plevel;
 710                                 return;
 711                         }
 712                         mathPrintError("Unmatched right delimiter");
 713 //        panic = true;
 714                         break;
 715
 716                 case LM_TK_FONT:
 717                         yyvarcode = static_cast<MathTextCodes>(yylval.l->id);
 718                         flags |= (FLAG_BRACE | FLAG_BRACE_FONT);
 719                         break;
 720
 721                 case LM_TK_STY:
 722                 {
 723                         lyxerr[Debug::MATHED] << "LM_TK_STY not implemented\n";
 724                         //MathArray tmp = array;
 725                         //MathSizeInset * p = new MathSizeInset(MathStyles(yylval.l->id));
 726                         //array.push_back(p);
 727                         //mathed_parse_into(p->cell(0), FLAG_BRACE_FONT);
 728                         break;
 729                 }
 730
 731
 732                 case LM_TK_DECORATION:
 733                 {
 734                         MathDecorationInset * p = new MathDecorationInset(yylval.l);
 735                         mathed_parse_into(p->cell(0), FLAG_ITEM);
 736                         array.push_back(p);
 737                         break;
 738                 }
 739
 740                 case LM_TK_NONUM:
 741                         curr_num = false;
 742                         break;
 743
 744                 case LM_TK_FUNC:
 745                         array.push_back(new MathSymbolInset(yylval.l));
 746                         break;
 747
 748                 case LM_TK_UNDEF:
 749                         if (MathMacroTable::hasTemplate(yytext)) {
 750                                 MathMacro * m = MathMacroTable::cloneTemplate(yytext);
 751                                 for (int i = 0; i < m->nargs(); ++i)
 752                                         mathed_parse_into(m->cell(i), FLAG_ITEM);
 753                                 array.push_back(m);
 754                                 m->metrics(LM_ST_TEXT);
 755                         } else
 756                                 array.push_back(new MathFuncInset(yytext));
 757                         break;
 758
 759                 case LM_TK_MATH:
 760                 case LM_TK_END:
 761                         --plevel;
 762                         return;
 763
 764                 case LM_TK_BEGIN:
 765                 {
 766                         int i = yylval.i;
 767                         MathInsetTypes typ = latex_mathenv[i].typ;
 768
 769                         if (typ == LM_OT_MATRIX) {
 770                                 string const valign = lexArg('[') + 'c';
 771                                 string const halign = lexArg('{');
 772                                 //lyxerr << "valign: '" << valign << "'\n";
 773                                 //lyxerr << "halign: '" << halign << "'\n";
 774                                 MathArrayInset * m = new MathArrayInset(halign.size(), 1);
 775                                 m->valign(valign[0]);
 776                                 m->halign(halign);
 777
 778                                 mathed_parse_lines(m, halign.size(), latex_mathenv[i].numbered, false);
 779                                 array.push_back(m);
 780                                 //lyxerr << "read matrix " << *m << "\n";
 781                                 break;
 782                         } else
 783                                 lyxerr[Debug::MATHED] << "unknow math inset " << typ << "\n";
 784                         break;
 785                 }
 786
 787                 case LM_TK_MACRO:
 788                         array.push_back(MathMacroTable::cloneTemplate(yylval.l->name));
 789                         break;
 790
 791                 case LM_TK_LABEL:
 792                         curr_label = lexArg('{', true);
 793                         break;
 794
 795                 default:
 796                         mathPrintError("Unrecognized token");
 797                         lyxerr[Debug::MATHED] << "[" << t << " " << yytext << "]" << endl;
 798                         break;
 799
 800                 } // end of big switch
 801
 802                 if (flags & FLAG_LEAVE) {
 803                         flags &= ~FLAG_LEAVE;
 804                         break;
 805                 }
 806
 807                 if (panic) {
 808                         lyxerr << " Math Panic, expect problems!" << endl;
 809                         //   Search for the end command.
 810                         do {
 811                                 t = yylex();
 812                         } while (yyis->good() && t != LM_TK_END && t);
 813                 } else {
 814                         t = yylex();
 815                 }
 816         }
 817         --plevel;
 818 }
 819
 820 }
 821
 822
 823 MathArray mathed_parse_cell(string const & str)
 824 {
 825         istringstream is(str.c_str());
 826         yyis     = &is;
 827         yylineno = 0;
 828         MathArray ar;
 829         mathed_parse_into(ar, 0);
 830         return ar;
 831 }
 832
 833
 834 MathMacroTemplate * mathed_parse_macro(string const & str)
 835 {
 836         istringstream is(str.c_str());
 837         return mathed_parse_macro(is);
 838 }
 839
 840
 841 MathMatrixInset * mathed_parse_normal(string const & str)
 842 {
 843         istringstream is(str.c_str());
 844         return mathed_parse_normal(is);
 845 }
 846
 847
 848
 849 MathMatrixInset * mathed_parse_normal(istream & is)
 850 {
 851         yyis     = &is;
 852         yylineno = 0;
 853         return mathed_parse_normal();
 854 }
 855
 856
 857 MathMacroTemplate * mathed_parse_macro(istream & is)
 858 {
 859         yyis     = &is;
 860         yylineno = 0;
 861         return mathed_parse_macro();
 862 }
 863
 864
 865
 866 MathMatrixInset * mathed_parse_normal(LyXLex & lex)
 867 {
 868         yyis     = &lex.getStream();
 869         yylineno = lex.getLineNo();
 870
 871         MathMatrixInset * p = mathed_parse_normal();
 872
 873         // Update line number
 874         lex.setLineNo(yylineno);
 875
 876         // reading of end_inset
 877         while (lex.isOK()) {
 878                 lex.nextToken();
 879                 if (lex.getString() == "\\end_inset")
 880                         break;
 881                 lyxerr[Debug::MATHED] << "InsetFormula::Read: Garbage before \\end_inset,"
 882                         " or missing \\end_inset!" << endl;
 883         }
 884
 885         return p;
 886 }
 887
 888 MathMacroTemplate * mathed_parse_macro(LyXLex & lex)
 889 {
 890         yyis     = &lex.getStream();
 891         yylineno = lex.getLineNo();
 892
 893         MathMacroTemplate * p = mathed_parse_macro();
 894
 895         // Update line number
 896         lex.setLineNo(yylineno);
 897
 898         // reading of end_inset
 899         while (lex.isOK()) {
 900                 lex.nextToken();
 901                 if (lex.getString() == "\\end_inset")
 902                         break;
 903                 lyxerr[Debug::MATHED] << "InsetFormula::Read: Garbage before \\end_inset,"
 904                         " or missing \\end_inset!" << endl;
 905         }
 906
 907         return p;
 908 }
 909 //]})